diff -u b/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
--- b/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -182,9 +182,9 @@
  *     following elements:
  *     - name: The name of the module.
  *     - enable: A checkbox for enabling the module.
- *     - description: (optional) A description of the module.
- *     - version: (optional) The version of the module.
- *     - links: (optional) Administration links provided by the module.
+ *     - description: A description of the module.
+ *     - version: The version of the module.
+ *     - links: Administration links provided by the module.
  *     - #requires: A list of modules that the project requires.
  *     - #required_by: A list of modules that require the project.
  *     - #attributes: A list of attributes for the module wrapper.
@@ -212,10 +212,6 @@
     $module['id'] = $id;
     $module['enable_id'] = $module['enable']['#id'];
     $module['machine_name'] = $key;
-    if (empty($module['version']['#markup'])) {
-      unset($module['version']);
-    }
-
     $module['requires'] = array_filter($module['#requires']);
     $module['required_by'] = array_filter($module['#required_by']);
 
diff -u b/core/modules/system/templates/system-modules-details.html.twig b/core/modules/system/templates/system-modules-details.html.twig
--- b/core/modules/system/templates/system-modules-details.html.twig
+++ b/core/modules/system/templates/system-modules-details.html.twig
@@ -18,10 +18,10 @@
  *   - enable_id: A unique id for interacting with the checkbox element.
  *   - description: The description of the module.
  *   - machine_name: The module's machine name.
- *   - version: (optional) Information about the module version.
- *   - requires: (optional) A list of modules that this module requires.
- *   - required_by: (optional) A list of modules that require this module.
- *   - links: (optional) A list of administration links provided by the module.
+ *   - version: Information about the module version.
+ *   - requires: A list of modules that this module requires.
+ *   - required_by: A list of modules that require this module.
+ *   - links: A list of administration links provided by the module.
  *
  * @see template_preprocess_system_modules_details()
  *